Oil mop



H. HERTZBERG May 6, 1930.

OIL MOP Filed Feb. 20, 1928 W Snom/woz 3513 @whom Patented May 6, 1930 HARRY HRRTZRERG, or BROOKLYN, New YORK oir. Mor

Application led February 20, 1928. Serial No.` 255,823.

ciently all the functions required from a mop of this kind.

in vWith this and other objects in view which will become clearer as the description pro gresses the invention consists in a novel construction and combination of parts hereinafter fully described and finally pointed out 25 in the appended claims.

ln the drawings which form a material part of this disclosure:

Fig. 1 is a plan view of a mop embodying the invention.

Fig. 2 is a side elevation of the same mop partly in section on line 2-2 of Fig. 1.

Fig. 3 is a detail section of the frame eX- i panding means on line 3-3 of F ig. 1.

Referring to the drawings is a metallic frame having the shape of an equilateral triangle provided with rounded corners. This frame is preferably made from a flat metallic bar bent into the shape of a V the legs of which form an angle of about 150 degrees as aoshown in section in Fig. 2, the groove formed in this manner is directed towards the outside of the frame. One side of this triangular frame is non-continuous as the end portions of the metallic bar are bent at corners 10a towards the center part of the triangle forming two substantially parallel flat plates 11 separated from each other to form a space for mop stick 15. The V groove in the frame ends at points l()a and plates 11 are bent in their middle portion at 11b so that the space between them is slightly larger near 10L than in the forward part. The free ends 11a of the plates hold the mop-stick 15 by means of a pivot bolt 12 which passes through apertures in plates 11 and also in mop stick 15. Bolt 12 is adapted to draw the plates 11 together and to tighten the mop stick between them in any desired angular position. The rearward portions of plates 11 between points 10a and 11b are also provided with apertures opposite each other through which a bolt 16 passes. A nut 17 on bolt 16 presses the plates 11 towards each other. This bolt 16 carries in the space between plates 11 tubular expansion members 18 and 19 of which 18 is provided with an external, and 19 with an internal thread, forming means to increase or decrease the length of the expansion member and to spread plates 11 apart.

The mop material comprises a plurality of fabric strands 2O which are looped over at their middle portion and secured within outer and inner fabric covering bands 21 and 21a. They are sewed together on lines 22 and 23 thus affording a tubular space through which a steel wire 14 passes. The tubular portion formedby the fabric bands 21 and 21El lies in the V groove of frame 10 and surrounds 'the triangle which is formed by this frame. The ends of wire 14 are joined within the opening of the frame 10 between the two points 10a by twisting them together and thereby holding the mop material tight on the frame 10. When the mop material is in place on the frame it is desirable to stretch the fabric bands holding the mop material and also wire la! so that the material becomes tied closely to frame 10 in its groove. This also becomes necessary when the mop material has become loose by stretching after being in use for some time. For this purpose l have provided the `expansion member 18-19 which spreads the points 10"L apart and with them elongates the open side of the triangle increasing its periphery and tightening the mop material onto frame 10. In addition to this spreading action the eXpansion member adds to the rigidity of the frame 1G. The frame may also be contracted by means of the elements lG-1718-19 so that the mop fabric tube 21 and wire lll become loose thereon and can be removed without opening the wire joint at the center of the open space between the corners 10a. It will be noticed that the whole mop head consists of a single piece of metal, two bolts and the expansion member or spreader 18-19 and that a plurality of elements usually found in similar devices are eliminated by this invention.

I-Iaving thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a mop of the kind described, an `open frame having the shape of a loop, a break in said frame, a pair of parallel plates integral with lsaid frameextending towardsthe center of the'lo-op' at either end .of thebreak in said frame, mop material surrounding said frame, means to hold a mop-stick between the free ends of said platesan'd other' mea-nsfor increasing the distance between said plates gradually, to expand said frame against said mop material.

2. In a mop of the kind described, an open rameof loop shape, said frame consisting of a continuous metallic bar having end portions Vforming parallelrplates projecting towards the center of the. frame, .a bolt to hold and to clampa mop stick between the projecting. ends efsaid bar and a Vcompression member parallely to said bolt adapted to varythedistance between said projecting ends yandto expand or contract said `frame.

'3. A mop frame comprising-a metallic bar ybentiniso the-shape `of a loop and having intergral'end portions :arrange'dzsubstantially parr allel toeach otherfatthe rear of the loop which end portions project into theframe, a pair ofV bolts `extending transversely through said parallel: portions, one: of said bolts holding a mo e 'stick' and theother bolt holding a tubular member adapted toK varyl the distance between sai'dparallel portions and to expand said loop. Y

4. A; mop frame consistingio'f a metallic bar bent intothe shape of a polygon, an open- 'ingy in one side, the end portions of said'bar being bent inwardly atV saidy opening parallel to each other,.and means lcarried by saidl end portion to expand and contract said mop :Fi-aine. .saidnmeans consisting of a tubular 1 `member `having a'threaded-joint for varying vits ylength land a supporting bolt passing throngh'saidfend portions and said tubular Y member.

In testimony whereof, I have signed my name'to this specification this 15th day of lebrnaryJQQS.

HARRY HERTZBERG. 

